speaking on monday, president obama said those responsible for the attacks would be brought to justice. >> we still do not know who did this or why. and people should not jump to conclusions before we have all the facts. but make no mistake, we will get to the bottom of this. and we will find out who did this. we will find out why they did this. , anyesponsible individuals responsible groups will feel the full weight of justice. >> we will have more on the boston marathon bombings after the headlines. in iraq, at least 55 people died as dozens of explosions and a shooting ripped through provinces across the country monday just days before elections. the worst violence struck the capital baghdad, where at least 25 people were killed by car bombs and other blasts. at least 14 political candidates have been killed in recent weeks that the provincial elections scheduled for saturday. monday's toll was the highest in nearly a month after 65 people died in blasts on march 19, the anniversary of the u.s.-led invasion. in somalia, a militant group is threatening to carry out more attacks in --